Can a plasma beam stop colon polyps from coming back?

This trial tests whether using a technique called hybrid argon plasma coagulation (h-APC) on the edges of the removal site can prevent colon polyps from growing back after endoscopic mucosal resection (EMR). EMR is a standard procedure for removing large polyps, but when polyps are removed in pieces, they can recur in 12-30% of cases. The study will include people with non-cancerous colon polyps of at least 20 mm. Half will receive standard EMR alone, and half will receive EMR plus h-APC ablation of the margins. The goal is to see if this extra step reduces recurrence to 5% or less.